Method for removing arsenic compound, method for regenerating nox removal catalyst, and nox removal catalyst
AssigneeMitsubishi Hitachi Power Systems, Ltd.
InventorsMasashi Kiyosawa, Norihisa Kobayashi
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Abstract
Provided is a practical method for dry-separating arsenic compounds from a used NOx removal catalyst contaminated with arsenic. The method for removing arsenic compounds comprises heat-treating a NOx removal catalyst contaminated with arsenic compounds at a predetermined temperature in a reducing atmosphere while exposing the catalyst to hydrocarbon compounds (except CH4) or oxygen-containing carbon compound.
Claims6
An apparatus for removing an arsenic compound, comprising a treatment unit which conducts heat-treatment of a NOx removal catalyst contaminated with the arsenic compound at a predetermined temperature in a reducing atmosphere while exposing the catalyst to hydrocarbon compounds except CH4 or oxygen-containing carbon compounds.
Dependencies are inferred from the claim text.